On Fri, 18 Sep 2009 21:15:33 +0100, Clot wrote:
Had to be replaced smartish.

Bought some proper sealant and no problem.

Never bought cheap sealant since.

I had exactly the same sort of experience - cartridge of cheap sealant
from a building recyclers (was there and I happened to need some -
figured it'd save me a trip across town to the DIY place). Never again.
Always buy the good stuff...

Don't know if it had got contaminated somehow (although not sure how,
given it was sealed) or was just ancient stock and the stuff (or at least
some brands) have a limited shelf life before use...

cheers

Jules